Property, Plant and Equipment

Property, plant and equipment and related accumulated depreciation consist of the following at June 30, 2016 and December 31, 2015:

2016

2015

Machinery and equipment

3,265,812

3,209,228

Transportation equipment

2,179,722

2,119,472

Containers

1,080,335

942,400

Airspace

865,076

865,076

Buildings

503,195

493,225

Improvements

338,799

338,799

Land

225,000

225,000

Leased equipment

179,620

179,620

Landfill area

72,098

72,098

Office furniture and equipment

4,186

5,771

Total Property, plant and equipment

8,713,843

8,450,689

Less: accumulated depreciation

(3,783,814

)

(3,409,409

)

Property, plant and equipment, net

$

4,930,029

$

5,041,280

Depreciation expense for the six months ended June 30, 2016 and 2015 was $375,992 and $71,198, respectively. Depreciation expense for the three months ended June 30, 2016 and 2015 was $190,438 and $39,736, respectively.

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.